改变体积及自由体积的线性混合规则,文中在Entropic-FV(EFV)模型中引入了可调参数,提出了修正EFV-λ模型.当λ=1时修正模型复原至EFV方程.与其它以基团贡献法为基础的热力学模型U-NIFAC-FV、EFV和EFV-1.2同时计算甲醇、乙醇、苯等溶剂与PDMS、PS、PIB等聚合物组成的聚合物溶液体系的溶剂活度,并与实验数据进行比较,平均偏差分别为6.24%、9.30%、7.56%和8.82%.结果表明,EFV模型在多数体系中优于UNIFAC-FV模型.对15种体系预测结果显示EFV-λ(λ=0.95)总体平均偏差最小.
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